I had a big laughter after reading your observation hahahahahaha. It's true, the road leads to left and entry is restricted by sign post hahaha. So what do we do? Well, I don't know if it's the same in USA or not but in EU, we're taught in the driving schools the rule of priority. A traffic seargent/agent has top priority (in case of conflicting signs), then we need to follow the traffic light, then sign posts and then road markings. In the given example, it's clear that traffic light is allowing to enter in the street with green. Perhaps in the rush hour, it doesn't permit traffic.
However, traffic in some places is funny. I found most difficult to understand how traffic flows in Zürich, Switzerland. Have you been there? It's funniest in all Europe to my observation hahahaha. And most angry drivers in general day to day life I found in Hamburg Germany. I don't know what do they eat in breakfast hahahaha, drivers are so angry on the road hahahahaha.
Kind Regards and Thanks for the visit,
Löbau Centrum (12)